How did I lose my badge when I answer every single message the same day?
Check your Spam folder. Anything there?
@BeadsandBottlescom: "How did I lose my badge ..." Usually the answer is in the applicable CSV file available on your Customer Service page (previous period for January 1st Star)? When you look at the file remember that that the dates / times are in UTC (not your time zone), only the first message of a new incoming thread is included (all that counts for Star Seller), and usually a new incoming thread is not included until after the 24 hour reply window has passed regardless of when you replied. Stats (and the CSV file) are updated only once per day so there may be an additional day's delay. There is also a link to the actual message thread so you can verify if the data is correct or not.
However there are reports that the 'current period' files are not accurate and up-to-date.